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(163132) 2002 CU11

From Wikipedia, the free encyclopedia

(163132) 2002 CU11
Discovery[1]
Discovered byLINEAR
Discovery date7 February 2002
Designations
(163132) 2002 CU11
NEO · PHA · Apollo[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc4600 days (12.59 yr)
Aphelion1.5795 AU (236.29 Gm)
Perihelion0.85959 AU (128.593 Gm)
1.2196 AU (182.45 Gm)
Eccentricity0.29517
1.35 yr (491.94 d)
47.609°
0° 43m 54.48s / day (n)
Inclination48.782°
157.77°
110.54°
Earth MOID0.00189035 AU (282,792 km)
Physical characteristics
Mean diameter
0.460±0.017 km[2][3]
0.730 km (assumed)[4]
Mass5.3×1011 kg (assumed)
0.408±0.061[2]
18.5[2]

(163132) 2002 CU11, provisional designation 2002 CU11, is a bright, sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group.[2] Based on absolute magnitude, it is the second largest asteroid known to have passed closer than the Moon.[5]

Description

2002 CU11 was discovered on 7 February 2002 by Lincoln Near-Earth Asteroid Research (LINEAR) at an apparent magnitude of 19 using a 1.0-meter (39 in) reflecting telescope.[1] It has an estimated diameter of 730 meters (2,400 ft).[4] The asteroid was listed on Sentry Risk Table with a Torino Scale rating of 1 on 20 March 2002.[4]

With an observation arc of 44 days, (163132) 2002 CU11 showed a 1 in 9,300 chance of impacting Earth in 2049.[6] It was removed from the Sentry Risk Table on 26 April 2002.[7] It is now known that on 3 September 2049 the asteroid will be 0.0843 AU (12,610,000 km; 7,840,000 mi) from Earth.[8]

Even though using an epoch of 27 June 2015 gives 2002 CU11 an Earth-MOID of 0.0000093 AU (1,390 km; 860 mi),[2] the asteroid does not make any threatening approaches to Earth in the foreseeable future.

Notable close-approaches to Earth[8]
Date Distance from Earth
1925-08-30 0.0023 AU (340,000 km; 210,000 mi)
2014-08-30 0.0346 AU (5,180,000 km; 3,220,000 mi)
2049-09-03 0.0843 AU (12,610,000 km; 7,840,000 mi)
2080-08-31 0.0042 AU (630,000 km; 390,000 mi)

The close approach of 2080 will cause an uncertainty of 4 minutes for the close approach time of 2084.[8]

History of close approaches of large near-Earth objects since 1908 (A)
PHA Date Approach distance in lunar distances Abs. mag
(H) 		Diameter (C)
(m) 		Ref (D)
Nominal(B) Minimum Maximum
(152680) 1998 KJ9 1914-12-31 0.606 0.604 0.608 19.4 279–900 data
(458732) 2011 MD5 1918-09-17 0.911 0.909 0.913 17.9 556–1795 data
(163132) 2002 CU11 1925-08-30 0.903 0.901 0.905 18.5 443–477 data
69230 Hermes 1937-10-30 1.926 1.926 1.927 17.5 700-900[9] data
69230 Hermes 1942-04-26 1.651 1.651 1.651 17.5 700-900[9] data
2017 NM<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">6</span></span> 1959-07-12 1.89 1.846 1.934 18.8 580–1300 data
(27002) 1998 DV<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">9</span></span> 1975-01-31 1.762 1.761 1.762 18.1 507–1637 data
2002 NY40 2002-08-18 1.371 1.371 1.371 19.0 335–1082 data
2004 XP14 2006-07-03 1.125 1.125 1.125 19.3 292–942 data
2015 TB145 2015-10-31 1.266 1.266 1.266 20.0 620-690 data
(137108) 1999 AN10 2027-08-07 1.014 1.010 1.019 17.9 556–1793 data
(153814) 2001 WN5 2028-06-26 0.647 0.647 0.647 18.2 921–943 data
99942 Apophis 2029-04-13 0.0981 0.0963 0.1000 19.7 310–340 data
2017 MB<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">1</span></span> 2072-07-26 1.216 1.215 2.759 18.8 367–1186 data
2011 SM<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">68</span></span> 2072-10-17 1.875 1.865 1.886 19.6 254–820 data
(163132) 2002 CU11 2080-08-31 1.655 1.654 1.656 18.5 443–477 data
(416801) 1998 MZ 2116-11-26 1.068 1.068 1.069 19.2 305–986 data
(153201) 2000 WO107 2140-12-01 0.634 0.631 0.637 19.3 427–593 data
(276033) 2002 AJ129 2172-02-08 1.783 1.775 1.792 18.7 385–1242 data
(290772) 2005 VC 2198-05-05 1.951 1.791 2.134 17.6 638–2061 data
(A) This list includes near-Earth approaches of less than 2 lunar distances (LD) of objects with H brighter than 20.
(B) Nominal geocentric distance from the center of Earth to the center of the object (Earth has a radius of approximately 6,400 km).
(C) Diameter: estimated, theoretical mean-diameter based on H and albedo range between X and Y.
(D) Reference: data source from the JPL SBDB, with AU converted into LD (1 AU≈390 LD)
(E) Color codes:   unobserved at close approach   observed during close approach   upcoming approaches

References

  1. ^ a b "MPEC 2002-C44 : 2002 CU11". IAU Minor Planet Center. 8 February 2002. Retrieved 18 September 2013. (K02C11U)
  2. ^ a b c d e f g "JPL Small-Body Database Browser: 163132 (2002 CU11)" (2010-08-11 last obs and observation arc=8.5 years). Jet Propulsion Laboratory. Archived from the original on 28 May 2019. Retrieved 7 April 2016.
  3. ^ "LCDB Data for (163132) 2002 CU11". Asteroid Lightcurve Database (LCDB). Retrieved 16 June 2020.
  4. ^ a b c "Current Impact Risks (2002 CU11)". Near-Earth Object Program. NASA. 21 March 2002. Archived from the original on 21 March 2002.
  5. ^ NEO Earth Close Approaches @ JPL CNEOS
    Select "Nominal dist <= 1 LD", "Past only", Sort by "H (mag)"
  6. ^ Andrea Milani; Giovanni Valsecchi & Maria Eugenia Sansaturio (2002). "The problem with 2002 CU11". Spaceguard / Tumbling Stone. Archived from the original on 4 March 2016. Retrieved 18 September 2013.
  7. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 18 September 2013.
  8. ^ a b c "JPL Close-Approach Data: 163132 (2002 CU11)" (2010-08-11 last obs and observation arc=8.5 years). Retrieved 18 September 2013.
  9. ^ a b Marchis, F.; et al. "Multiple asteroid systems: Dimensions and thermal properties from Spitzer Space Telescope and ground-based observations". Icarus. 221 (2): 1130–1161. Bibcode:2012Icar..221.1130M. doi:10.1016/j.icarus.2012.09.013. Retrieved 24 August 2018.

External links

Preceded by Large NEO Earth close approach
(inside the orbit of the Moon)
30 August 1925 		Succeeded by
This page was last edited on 27 November 2023, at 19:13
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